2 #include <msp/strings/format.h>
14 static const char blur_fs[]=
15 "uniform sampler2D source;\n"
16 "uniform vec2 delta;\n"
17 "uniform float factors[19];\n"
19 "varying vec2 texcoord;\n"
22 " gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0);\n"
23 " for(int i=0; i<=size*2; ++i)\n"
24 " gl_FragColor += texture2D(source, texcoord+delta*float(i-size))*factors[i];\n"
27 static const char combine_fs[]=
28 "uniform sampler2D source;\n"
29 "uniform sampler2D blurred;\n"
30 "uniform float strength;\n"
31 "varying vec2 texcoord;\n"
34 " gl_FragColor = mix(texture2D(source, texcoord), texture2D(blurred, texcoord), strength);\n"
42 Bloom::Bloom(unsigned w, unsigned h):
43 quad(get_fullscreen_quad())
45 blur_shader.attach_shader(get_fullscreen_vertex_shader());
46 blur_shader.attach_shader_owned(new FragmentShader(blur_fs));
49 combine_shader.attach_shader(get_fullscreen_vertex_shader());
50 combine_shader.attach_shader_owned(new FragmentShader(combine_fs));
51 combine_shader.link();
53 blur_shdata[0].uniform("delta", 1.0f/w, 0.0f);
54 blur_shdata[1].uniform("delta", 0.0f, 1.0f/h);
56 blur_shdata_common.uniform("source", 0);
57 for(unsigned i=0; i<2; ++i)
59 tex[i].set_min_filter(NEAREST);
60 tex[i].set_wrap(CLAMP_TO_EDGE);
61 tex[i].storage(RGB16F, w, h);
62 fbo[i].attach(COLOR_ATTACHMENT0, tex[i], 0);
63 fbo[i].require_complete();
66 combine_shdata.uniform("source", 1);
67 combine_shdata.uniform("blurred", 0);
69 combine_texturing.attach(0, tex[1]);
75 void Bloom::set_radius(float r)
78 throw invalid_argument("Bloom::set_radius");
80 int size = min(static_cast<int>(r*3.0f), 9);
81 blur_shdata_common.uniform("size", size);
83 vector<float> factors(size*2+1);
86 for(int i=-size; i<=size; ++i)
87 sum += (factors[size+i] = exp(-i*i/r));
88 for(int i=0; i<=size*2; ++i)
91 blur_shdata_common.uniform1_array("factors[0]", size*2+1, &factors.front());
94 void Bloom::set_strength(float s)
97 throw invalid_argument("Bloom::set_strength");
98 combine_shdata.uniform("strength", s);
101 void Bloom::render(const Texture2D &src, const Texture2D &)
103 BindRestore unbind_dtest(static_cast<DepthTest *>(0));
104 BindRestore unbind_blend(static_cast<Blend *>(0));
107 Bind bind_shader(blur_shader);
108 blur_shdata_common.apply();
109 for(unsigned i=0; i<2; ++i)
111 BindRestore bind_fbo(fbo[i]);
112 Bind bind_tex(i ? tex[0] : src);
113 blur_shdata[i].apply();
118 combine_texturing.attach(1, src);
119 Bind bind_texturing(combine_texturing);
120 Bind bind_shader(combine_shader);
121 combine_shdata.apply();